I told them over the phone my 1995 jeep cherokee check
engine code, they said that if it was what they thought, it
would cost $140. I took it in, they found something
unplugged, and said that there would be no charge. They
could have charged me the $140, I wouldn't have known any
better. I once had them replace the serpentine belt on a
1997 stratus, it broke, then the car wouldn't run right.
Turns out the timming belt had been moved a couple of
teeth. They researched it and fixed everything for free.
The prices are by the book by the hour, but I really trust
these guys.